mybatis实战教程三：mybatis和springmvc整合
一、搭建maven环境，引入相关jar
二、写web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>Archetype Created Web Application</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.context.ContextCleanupListener</listener-class> </listener> <servlet> <servlet-name>mvc-dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc-dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
三、写springmvc的xml文件mvc-dispatcher-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <context:component-scan base-package="com.yihaomen.mybatis" /> <mvc:annotation-driven /> <mvc:resources mapping="/static/**" location="/WEB-INF/static/" /> <mvc:default-servlet-handler/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix"> <value>/WEB-INF/pages/</value> </property> <property name="suffix"> <value>.jsp</value> </property> </bean> </beans>
四、写spring的配置文件applicationContext.xml
<?xml version="1.0" encoding="utf-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd" default-autowire="byName" default-lazy-init="false"> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="10" /> <property name="minIdle" value="10" /> <property name="maxActive" value="20" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="validationQuery" value="SELECT 'x'" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache，并且指定每个连接上PSCache的大小 --> <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> <!-- 配置监控统计拦截的filters，去掉后监控界面sql无法统计 --> <property name="filters" value="stat" /> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.yihaomen.mybatis.dao"></property>
<property name="sqlSessionFactoryBeanName" value="demoSqlSessionFactory"></property>
</bean>
<bean id="demoSqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!--dataSource属性指定要用到的连接池--> <property name="dataSource" ref="dataSource"/> <!--configLocation属性指定mybatis的核心配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <property name="mapperLocations" value="classpath:com/yihaomen/mybatis/model/*.xml"/> </bean> </beans>
五、mybatis-config.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <settings> <!--这个配置使全局的映射器启用或禁用缓存--> <setting name="cacheEnabled" value="true"/> <!-- 允许jdbc支持生成的键。需要适合的驱动。如果设置为true， 则这个设置强制生成的键被使用，尽管一些驱动拒绝兼容但 仍然有效 --> <setting name="useGeneratedKeys" value="true"/> <!--配置默认的执行器。SIMPLE执行器没有什么特别之初。 REUSE执行器重用预处理语句。BATCH执行器重用语句和批量更新--> <setting name="defaultExecutorType" value="REUSE"/> <!--设置超时时间，它决定驱动等待一个数据库相应时间--> <setting name="defaultStatementTimeout" value="25000"/> </settings> <!--配置别名--> <typeAliases> <typeAlias alias="Student" type="com.yihaomen.mybatis.model.Student"/> </typeAliases> <!--指定映射器路径--> <mappers> <mapper resource="com\yihaomen\mybatis\model\Student.xml"/> </mappers> </configuration>
六、jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mybatis-learn?characterEncoding=utf8
jdbc.username=root
jdbc.password=tiger
maxActive= 50
七、DAO层
/** * 这里的@MapperScan就是上面所讲的Mapper扫描器中所需要的配置，会自动生成代理对象。 * 注意，接口中的方法名称要和对应的MyBatis映射文件中的语句的id值一样，因为生成的 * 动态代理，会根据这个匹配相应的Sql语句执行。另外就是方法的参数和返回值也需要注 * 意。接口中的方法如何定义，对应的MyBatis映射文件就应该进行相应的定义。 * 最后，标注中的userDao是用来作为Spring的Bean的id(或name)进行使用的，方便我 * 们在Service层进行注入使用。 */ @MapperScan public interface ArticleMapper { public List<Article> getUserArticles(int userId); }
八、service层
public interface ArticleService { public List<Article> getArticles(); }
@Service public class ArticleServiceImpl implements ArticleService { @Autowired private ArticleMapper articleMapper; public List<Article> getArticles() { return articleMapper.getUserArticles(1); } }
九、Controller层
@Controller @RequestMapping("/user") public class UserController { @Autowired private ArticleService articleService; @RequestMapping("/list") public ModelAndView userListAll(HttpServletRequest request, HttpServletResponse response) { List<Article> articleList = articleService.getArticles(); ModelAndView mv = new ModelAndView("list"); mv.addObject("articles", articleList); return mv; } }
https://gitee.com/huayicompany/springmvc-mybatis
参考：
[1] 《mybati实战教程》
